Taken together, mass migration, mass starvation and mass extinctions are what we will see if we sleep walk into a future of unmitigated climate change. These stresses will ruin economies and drive competition over dwindling resources.

Smell is an outlier. The brain essentially sent out a little tentacle into the world, those nerve fibres are the only contact between the central nervous system and the external world. This is the point at which there is no barrier between the brain and the outside world.

The issue you're worried about, the one you're likely spending most of your time discussing, isn't the only problem in the world. We tend to lose sight of this because we often perceive our immediate tasks as the most crucial. Given the multitude of issues we need to address, the goal shouldn't be to resolve a single problem in an exhaustive and expensive way.

Many great startup ideas fall into the 'sounds like a bad idea, is a good idea' category. In fact, most of them do. These are the most dangerous ideas—the ones that sound plausibly good but aren't. There was nobody desperate for a social network for sports fans, so it failed.

Most great sellers and leaders figure out the things they love about their job – what they would do for free – and set up the infrastructure to intentionally avoid the parts that force them to show up inauthentically.